4 files changed, 175 insertions, 0 deletions
diff --git a/roles/scag/tasks/main.yml b/roles/scag/tasks/main.yml
new file mode 100644
index 0000000..ca26c3e
--- /dev/null
+++ b/roles/scag/tasks/main.yml
@@ -0,0 +1,125 @@
+- name: Install scag by pre-compiling the binary
+  when: ( not ( scag_install_method is defined ) ) or scag_install_method == "precompile"
+  block:
+    - name: Fetch scag source code
+      delegate_to: 127.0.0.1
+      become: false
+      ansible.builtin.git:
+        repo: https://git.joeac.net/scag.git
+        dest: /tmp/scag
+        depth: 1
+    - name: Cross-compile scag
+      delegate_to: 127.0.0.1
+      become: false
+      ansible.builtin.shell:
+        cmd: cross build --release --target {{ rust_target }}
+        chdir: /tmp/scag
+      changed_when: "'Compiling' in _task.result.stderr"
+    - name: Install scag binary
+      ansible.builtin.copy:
+        src: /tmp/scag/target/{{ rust_target }}/release/scag
+        dest: /usr/bin/scag
+        mode: +x
+
+- name: Install or update scag using rustup
+  when: scag_install_method == "rustup"
+  block:
+    - name: Install Rust toolchain using installation script
+      ansible.builtin.shell:
+        cmd: curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
+        creates: /usr/bin/rustc
+    - name: Update Rust toolchain with rustup
+      ansible.builtin.shell: rustup update
+      changed_when: "'updated' in _task.result.stdout"
+    - name: Install or update scag using cargo
+      ansible.builtin.shell:
+        cmd: cargo install --git git://git.joeac.net/scag.git
+      changed_when: "'Installed' in _task.result.stdout or 'Replaced' in _task.result.stdout"
+    - name: Install daily crontab to update scag using cargo
+      ansible.builtin.cron:
+        special_time: daily
+        name: Update scag
+        job: cargo install --git git://git.joeac.net/scag.git
+
+- name: Install scag using cargo provided by APK
+  when: scag_install_method == "cargo"
+  block:
+    - name: Install cargo using APK
+      community.general.apk:
+        name: cargo
+    - name: Install or update scag using cargo
+      ansible.builtin.shell:
+        cmd: cargo install --git git://git.joeac.net/scag.git
+      changed_when: "'Installed' in _task.result.stdout or 'Replaced' in _task.result.stdout"
+    - name: Install daily crontab to update scag using cargo
+      ansible.builtin.cron:
+        special_time: daily
+        name: Update scag
+        job: cargo install --git git://git.joeac.net/scag.git
+
+- name: Create scag configuration directory
+  ansible.builtin.file:
+    path: /etc/scag
+    state: directory
+
+- name: Configure scag
+  ansible.builtin.template:
+    src: scag.toml
+    dest: /etc/scag/config.toml
+
+- name: Configure HTML feed head
+  ansible.builtin.shell:
+    cmd: |
+      curl --silent https://git.joeac.net/joeac.net.git/plain/http/share/components/head.upphtml \
+        | grep -E ^\<link\ rel=\"stylesheet\" \
+        > {{ feed_html_head }}
+    creates: "{{ feed_html_head }}"
+
+- name: Configure HTML feed header
+  ansible.builtin.template:
+    src: header.html
+    dest: "{{ feed_html_header }}"
+
+- name: Fetch subscriptions
+  ansible.builtin.git:
+    repo: git://git.joeac.net/subscriptions.git
+    dest: "{{ src_dir }}/subscriptions"
+    depth: 1
+
+- name: Symlink subscriptions into scag configuration directory
+  ansible.builtin.file:
+    src: "{{ src_dir }}/subscriptions/subscriptions.txt"
+    dest: /etc/scag/subscriptions.txt
+    state: link
+
+- name: Create directory for RSS file
+  ansible.builtin.file:
+    path: "{{ http_files_dir }}/feed/{{ feed_dir }}"
+    state: directory
+    owner: nginx
+    group: nginx
+
+- name: Use scag to generate RSS file
+  ansible.builtin.shell:
+    cmd: scag
+    creates: "{{ http_files_dir }}/feed/{{ feed_rss_path }}"
+
+- name: Install nginx location config
+  register: nginx_conf
+  ansible.builtin.template:
+    src: nginx/feed.conf
+    dest: /etc/nginx/http.d/joeac.net.locations.d/feed.conf
+
+- name: Restart nginx
+  when: nginx_conf is changed
+  ansible.builtin.service:
+    name: nginx
+    state: restarted
+
+- name: Install hourly crontab to update subscriptions and run scag
+  ansible.builtin.cron:
+    special_time: daily
+    name: Run scag
+    job: >-
+      git -C "{{ src_dir }}/subscriptions" pull;
+      scag
diff --git a/roles/scag/templates/header.html b/roles/scag/templates/header.html
new file mode 100644
index 0000000..20ea0f1
--- /dev/null
+++ b/roles/scag/templates/header.html
@@ -0,0 +1,30 @@
+<nav>
+    <ul>
+        <li>
+            <a href=/>Home</a>
+        </li>
+        <li>
+            <a href=/{{ feed_rss_path }}>RSS</a>
+        </li>
+    </ul>
+</nav>
+
+<script type=module>
+function makeDetailsToggler(details) {
+  return () => {
+    if (details.hasAttribute('open')) {
+      details.removeAttribute('open');
+    } else {
+      details.setAttribute('open', '');
+    }
+  };
+}
+
+for (const entry of document.querySelectorAll('.h-entry')) {
+  const details = entry.querySelector('details');
+  const summary = entry.querySelector('summary');
+  const toggleDetails = makeDetailsToggler(entry.querySelector('details'));
+  entry.addEventListener('click', toggleDetails);
+  summary.addEventListener('click', toggleDetails);
+}
+</script>
diff --git a/roles/scag/templates/nginx/feed.conf b/roles/scag/templates/nginx/feed.conf
new file mode 100644
index 0000000..6f650ba
--- /dev/null
+++ b/roles/scag/templates/nginx/feed.conf
@@ -0,0 +1,4 @@
+location /feed {
+  root   {{ http_files_dir }}/feed;
+  try_files $uri $uri.xml $uri.rss $uri.atom $uri.rss.xml $uri.html $uri/index.html $uri.php $uri/index.php =404;
+}
diff --git a/roles/scag/templates/scag.toml b/roles/scag/templates/scag.toml
new file mode 100644
index 0000000..9eafa6c
--- /dev/null
+++ b/roles/scag/templates/scag.toml
@@ -0,0 +1,16 @@
+subscriptions_path = "subscriptions.txt"
+
+[feed]
+title = "Stuff that Joe Carstairs wants to read"
+description = "Stuff that Joe Carstairs wants to read"
+url = "https://joeac.net/feed"
+
+[output]
+outfile_rss = "{{ http_files_dir }}/feed/{{ feed_rss_path }}"
+outfile_html = "{{ http_files_dir }}/feed/{{ feed_html_path }}"
+produce_formats = ["html", "rss"]
+max_age = 31
+
+[output.html]
+head = "{{ feed_html_head }}"
+header = "{{ feed_html_header }}"